Home / 11,421.11-17,129.57-5,179.63

Finding the Fourth Proportional to 11,421.11, 17,129.57 and 5,179.63

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Solution

The fourth proportional to 11,421.11, 17,129.57 and 5,179.63 is: 7,768.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.11 : 17,129.57 = 5,179.63 : x
  2. Step 2: Convert to fraction form
    11,421.11/17,129.57 = 5,179.63/x
  3. Step 3: Cross multiply
    11,421.11x = 17,129.57 × 5,179.63
  4. Step 4: Simplify right side
    11,421.11x = 88,724,761.96
  5. Step 5: Solve for x
    x = 88,724,761.96/11,421.11
  6. Step 6: Final answer
    x = 7,768.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.